So..does she like me?

I met a female acquaintance of mine recently. I was attracted from the first day. We'd started working on a project together with other people so I tried to contain myself. On the first day, I noticed that while we talking (and she was sitting immediately opposite me) she started twirling her hair halfway through the convo. She knew the one other person who was there from before and so asked me to tell her about myself. Today we were standing opposite to each other. We met to exchange a package and halfway through the convo, she started playing with her hair...smoothing out her hair and running her fingers lightly through her hair while chatting with me. Is playing with her while chatting with me a strong flirting signal?